Apparatus for feeding powdered material



Oct. 4, 1932.

R. D. HULSLANDER 1,880,452

APPARATUS FOR FEEDING POWDERED MATERIAL Filed July 31, 1930 4 Sheets-Sheet 1 INVENTOR ATTORNEYS 1932- R. D. HULSLANDER 1,880,452

APPARATUS FOR FEEDING POWDERED MATERIAL Filed July 51, 1950 4 Sheets-S heet 2 2,415 l7, ffuLSL RA/ZJE/i. W M-.

ATTORNEYS,

Oct. 4, 1932. R. D. HULSLANDER' APPARATUS FOR FEEDING POWDERED MATERIAL Filed July 31, 1930 4 Sheets-Sheet 5 INVENTOR Ray .D, f/LSL/ZND ATTORNEYS Oct. 4, 1932. R. D. HULSLANDER APPARATUS FOR' FEEDING POWDERED MATERIAL Filed July 31, 1930 4 Sheets-Sheet 4 INVENTOR ATTORNEYS,

Patented Oct. 4, 1932 my D. nunsmmnnn, or AKRON,

PATENT OFFICE OHIO, ASSIGNOB TO THE FIBESTONE TIRE & RUBBER Cour-ANY, OF AKRON, OHIO, A CORPORATION OF OHIO AI P AR-ATUS FOB FEEDING POWD EBED MATERIAL a lication .flled m 31,

This invention relates to apparatus for feedin powdered material and more particular y to mechanism for dusting or otherwise treating rubber goods with soapstone, starch or the like.-

The general object of the invention resides in the provision of an inexpensive, fool roof eflicient apparatus which is readily a apted to a plurality of powder-feeding uses.

It is an object of the invention to provlde apparatus which can be controlled to vary the concentration and amount of powder sup lied.

, trated in the accompanyin T e above and other objects of the invention are achieved by the ap aratus illusrawings and described below, it being un erstood that the invention is not limited to the exact details thereof shown and described.

In the drawings,

Figure 1 is a side elevation of the apparatus embodying the invention;

Figure 2 is a front elevat'on of the apparatus shown in Figure 1';

Figure 3 is a plan view of the apparatus illustrating it in use on a tubing machine;

Figure 4 is a vertical sectional view of the vibrator andnozzle incorporated in the invention; and

Figure 5 is a bottom plan view of the nozzle shown in Figure 1 and is taken on line 5-5 of Fi re 1.

Referring to the drawings, the numeral '7 {Indicates a frame which serves to carry a opper or bin 8 of an shape, the top of w ich may be open or closed. The hopper 8 is funnel-shaped and at its bottom is formed with. an opening 9. An electric vibrator 11 is secured over the bottom of the hopper 8 which is provided with a bottom flange 12 for this'purpose. The vibrator 11 is of any standard type and in itself forms no part of the present invention.- 1

The usual diaphragm of the vibrator is appropriate size and replaced by a rubber diaphragm 13 which is pierced by a rubber tube 14 which opens adacent the opening 9 in the hopper. The tube 14 may be vulcanized, cemented or otherwise secured to the diaphragm 13.

to the interior 0 powder.

1980. Serial No. 478,018.

In order to control the size of the opening in the tube 14, a needle valve 15 is provide which extends downwardly into the tube .14 as shown in Figure 4. The needle valve 15 is journaled in suitable bushingson the hopper, including a nut bushing 16, and is provided at its upper end with a handwheel 17 for purposes of adjustment. 1

The tube 14 extends down into a T 18 in one end of which is screwed a nozzle 19 connected through conduit 21 to a supply of compressed am An air filter 22 and a control valve 23 are provided in the conduit 21.

In the embodiment of the invention shown in Fi re 1 the other side of the T 18.is connecte by a conduit 24 with a nozzle. or distributor head 25 whereby the powdered material can be supplied for any purpose, such as, for example, coating the outside of a green tube 26, carried on a conveyor 27, with the powdered material. A hood may be provided about the conveyor and discharge nozzle as will be understood.

' Another adaption of the invention is illustrated in Figure 3 wherein the apparatus is utilized to su ply the powdered material an extruded or tubed automobile inner tube to prevent the inner surfaces of the walls from sticking together. Referring to Figure 3, an extruder of standard design is'indicated at 28, the conduit 24 "from the powder-feeding apparatus being or die'as 7 connected to the internal mandrel is well understood in the art.

In the operation of the apparatus the hopper or bin 8 is filled with the desired powdered material and the electric vibrator is started which will cause the powder to feed down through .the tube 14. The amount of powder passing through the tube can be con trolled of course by the position of the needle valve 15.

Air supplied through the conduit'21 and nozzle 19 serves to atomize the powder fed through the tube 14 and forces it out the conduit 24 in an intimate The position of the nozzle 19 and the T 18 is such that it produces a sucking action on the tube 14 which assists in the feeding action of the powder therethrough.

mixture of air and By adjusting the needle valve 15 by way of handwheel 17, and also adjustin air valve 23 the amount of powder supplie as well as the relative amounts of air and powder can be very accurately adjusted and controlled.

As many changes could be made in the construction and in the uses of the invention, it is intended that all matter herein disclosed shall be interpreted as illustrative only and not in a limlting sense. Accordingly, various modifications and applications of the invention can be resorted to without depart-' ing from the spirit of the invention or the scope of the appended claims.

What is claimed is:

1. Powder-feeding mechanism comprisin a hopper for containingthe powder, a vi rator secured to the bottom of the hopper, a flexible rubber diaphragm in said vibrator, a tube piercing said diaphragm and secured thereto, said tube being in alignment with an opening in the bottom of the hop er, and a needle valve adjustably controlling the opening in the tube.

2. Powder-feeding mechanism comprising a hopper for containing the owder, a vibrator secured to the bottom 0 the hopper, a flexible rubber diaphragm in said vibrator, and a flexible discharge tube piercing said diaphragm and secured thereto, said tube being in alignmentwith an opening in the bottom of the hopper.

3. Powder-feeding mechanism comprising a hopper for containing the powder, a vibrator secured to the bottom of the hopper, a diaphragm insaid vibrator, and a tube piercin said diaphragm'and secured thereto, sai tube being in ali ment with an opening in the bottom of t je hopper.

4. Powder-feeding mechanism comprising a hopper for containing-the powder, a vibrator secured to the bottom of the hopper, a diaphragm in said vibrator, a discharge outlet connected to said diaphragm, and a needle valve adjacent saidoutlet for defin ing an adjustable orifice in said diaphragm.

5. In combination, a hopper having a funnel-like discharge opening, a diaphragm closing said opening, a discharge tube pierc 8. In combination, a hopper having a funnel-like discharge opening}, a diaphragm closing said 0 ening, a disc arge tube piercing said diap ragm, means for controlling In witness whereof I have hereunto affixed my signature this 28th day of July, 1930. RAY D. HULSLANDER.

ing said diaphragm, means-for controlling the size of the passage throu h said discharge tube, and means for vi rating said diaphragm.

6. In combination, a hopper having a'funnel-like discharge opening, a diaphragm closing said opening, a discharge'tube piercing said diaphragm, and means for vibrating said diaphragm.

7. In combination, a hopper having a funnel-like discharge opening, a diaphragm closing said opening, a discharge tube piercing sald diaphragm, a valve for controlling the size of the passage through said discharge tube, and means for vibrating said diaphragm adjacent said valve. 

